Interesting.
My Hiyori is at 52 already so once the event comes it'll be a cake to level her further. As far as i saw a fair time ago, Saki Kakiuchi was one of the best SR cards so i went and hit 100 with her sometime during the event (she was 70ish before the event already). Akie is obviously at 100 too since i raised her during the event. Other than that i have Runa and Yui Takami at 80ish
That should probably cover me on the pvp battles, right? I have every non-payer card apart from the limited SR from Clit-chan and the 30 day login one (and possibly more if there are story mode ones i cannot get yet because i have not cleared all the story mode).